REFINEMENT OF STRATIGRAPHIC BOUNDARIES AND IDENTIFICATION OF ZONES OF BREAKS IN SEDIMENTATION BY WELL DRILLING CUTTINGS

Abstract

By the example of studying the drilling cuttings from the carbonate deposits of Bashkir age it is shown that lithologic-petrographic, physic-mechanical, mineralogical and geochemical properties of cuttings change at the opening of stratigraphic boundaries. Cappametric research proves that the petromagnetic units, as a rule, coincide with the stratigraphic ones, but in some cases the analysis of the petromagnetic rhythm allows to refine the stratigraphic boundaries.